Solve the problem.How old is a skeleton that has lost 25% of its carbon-14? The decay rate, k, of carbon-14 is 0.01205% per year.
A. 24 years
B. 11,505 years
C. 1598 years
D. 2387 years
Answer: D
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Evaluate.
A. 2 B. -2 C. -1 D. -3
?Which of the following is not an example of a function? ?
A. ?You buy gas at the gas pump. x represents the number of gallons and y represents the cost of x gallons. B. ?Cookies are advertised for $2.50 each and coffee for $2.00 each. If you buy 3 cookies and spend a total of $9.5, how much did you spend for coffee? C. ?The amount of money you spend out of your wallet is related to the amount of money left in your wallet. D. ?The amount of calories you burn is related to your pulse rate. E. ?Shirts are advertised at $15 each. You buy x number of shirts.
Solve the initial value problem.
= 6(2x - 8)-6, y(0) = 1
A. y = - 
(2x - 8)-5 + 1
B. y = (2x - 8)-5 - 5
C. y = - 
(2x - 8)-5 + 1
D. y = - 
(2x - 8)-7 + 1
Factor completely.2x3 + 4x2 - 30x
A. (x - 3)(2x2 + 10) B. 2x(x - 3)(x + 5) C. (2x2 + 6x)(x - 5) D. 2x(x + 3)(x - 5)